GCN Circular 27575
Subject
GRB 200412B: Tautenburg observations
Date
2020-04-14T10:45:57Z (5 years ago)
From
Sylvio Klose at TLS Tautenburg <klose@tls-tautenburg.de>
S. Klose, B. Stecklum, S. Melnikov, and A. Nicuesa Guelbenzu (all
Tautenburg) report:
We continued observing the field of GRB 200412B (Fermi GBM team, GCN
27547) with the Tautenburg 1.34m Schmidt telescope equipped with the
TAUKAM 6k x 6k CCD camera and the wide V-band filter (VB; Stecklum et al.,
GCN 27567).
For the optical transient (Lipunov et al., GCN 27555, 27556) at a mean
time APR 13, 21:08:59 UT (1.500 days post burst) we measure VB = 20.27 +/-
0.03. Compared to our 1st-epoch observations (dt=0.51 days; Stecklum et
al., GCN 27567) this provides a decay slope of alpha = 1.58 (F\nu \propto
t**(-\alpha)), in agreement with the results reported by Xin et al. (GCN
27571) and Belkin et al. (GCN 27574).